Measured total cross sections of slow neutrons scattered by solid deuterium and implications for ultracold neutron sources

The total scattering cross sections for slow neutrons with energies in the range 100 neV to 3 meV for solid ortho-2H2 at 18 and 5 K, frozen from the liquid, have been measured. The 18 K cross sections are found to be in excellent agreement with theoretical expectations and for ultracold neutrons dominated by thermal up scattering. At 5 K the total scattering cross sections are found to be dominated by the crystal defects originating in temperature induced stress but not deteriorated by temperature cycles between 5 and 10 K.     

Spin observables in neutron-proton elastic scattering

The analyzing power, , and the polarization transfer observables , and have been measured in neutron-proton elastic scattering at 260, 318, 386, 472 and 538 MeV for c.m. scattering angles between 64° and 160°. The data were obtained at PSI with a polarized neutron beam and a polarimeter analyzing the transverse polarization of the outgoing proton. They make a significant impact on the knowledge of the Isospin I = 0 nucleon-nucleon scattering. Received: 27 January 1998 / Published online: 30 March 1998     

A comprehensive analysis of nucleon decay into antineutrino plus meson within minimalSU(5) supergravity

Zeitschrift für Physik C Particles and Fields - The combined lifetime limit on nucleon decay into antineutrino plus meson is used to explore systematically the parameter space of the...     

Synthesis of 7-ethyl-4,7-dihydro-4-oxo-2-(4-pyridinyl)thieno[2,3-b]pyridine-5-carboxylic acid

7-Ethyl-4,7-dihydro-4-oxo-2-(4-pyridinyl)thieno[2,3-b]pyridine-5-carboxylic acid ( 4 ), an analog of nalidixic acid, was synthesized in seven steps starting from commercially available 4-methylpyridine. Bacterial susceptibility to compound 4 was tested and the title compound was found to exhibit only weak antibacterial activity against a variety of pathogens including S. Aureus, E. Coli and P. Aeruginosa.